[clang-tools-extra] [clangd] fix extract-to-function for overloaded operators (PR #81640)

[Julian Schmidt via cfe-commits]

https://github.com/5chmidti commented:

CC @HighCommander4 @kadircet 

Technically, Sam told me last EuroLLVM that he had some refactor of the `SelectionTree` that would resolve issues like this in the general case, but as it is unclear that those changes will get in someday/in the 'near' future, I think that this PR makes sense to merge. Even though this is kind of a band-aid fix. Thoughts?

https://github.com/llvm/llvm-project/pull/81640